12544020245 has 4 divisors (see below), whose sum is σ = 15052824300. Its totient is φ = 10035216192.

The previous prime is 12544020193. The next prime is 12544020259. The reversal of 12544020245 is 54202044521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3221924644 + 9322095601 = 56762^2 + 96551^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544020245 - 2⁸ = 12544019989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254402020 + ... + 1254402029.

It is an arithmetic number, because the mean of its divisors is an integer number (3763206075).

Almost surely, 2^12544020245 is an apocalyptic number.

It is an amenable number.

12544020245 is a deficient number, since it is larger than the sum of its proper divisors (2508804055).

12544020245 is an equidigital number, since it uses as much as digits as its factorization.

12544020245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508804054.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 12544020245 its reverse (54202044521), we get a palindrome (66746064766).

The spelling of 12544020245 in words is "twelve billion, five hundred forty-four million, twenty thousand, two hundred forty-five".